CLACK (3)

Clack, n. [[Cf. F. claque a slap or smack, MHG. klac crack, W. clec crack, gossip. See Clack, v. t.]] 1. 1. A sharp, abrupt noise, or succession of noises, made by striking an object.
2. 2. Anything that causes a clacking noise, as the clapper of a mill, or a clack valve.
3. 3. Continual or importunate talk; prattle; prating.
Whose chief intent is to vaunt his spiritual clack. South. Clack box (Mach.), the box or chamber in which a clack valve works. — Clack dish, a dish with a movable lid, formerly carried by beggars, who clacked the lid to attract notice. Shak. Clack door (Mining), removable cover of the opening through which access is had to a pump valve. — Clack valve (Mach.), a valve; esp. one hinged at one edge, which, when raised from its seat, falls with a clacking sound.